Special Parking Rules. 1  When you park alongside a curb on a level street, the front and back wheels must be parallel and within 18 inches of the curb. 2  Never leave your vehicle while the engine is still running; stop the engine and set the parking brake.
The ozone layer is a deep layer in the stratosphere, encircling the Earth, that has large amounts of ozone in it. The layer shields the entire Earth from much of the harmful ultraviolet radiation that comes from the sun.he ozone layer became more widely appreciated by the public when it was realized that certain chemicals mankind manufactures, called chloroflurocarbons, find their way up into the stratosphere where, through a complex series of chemical reactions, they destroy some of the ozone.
In the stratosphere, around 20km above the earth's surface, ozone is formed by the action of the sun's ultraviolet rays on dioxygen. Thus, a layer of ozone envelops the earth, where its UV-absorbing property shields us from the harmful effects of the sun.zone is an allotrope of oxygen. Allotropes are different forms of the same element, for example diamond and graphite are allotropes of carbon. The oxygen in air is made up of two oxygen atoms bonded together, and is formally called dioxygen.